feat: add FastAPI web service wrapper

- Create REST API with endpoints for single and batch analysis
- Add async job support for long-running batch operations
- Implement job status tracking and listing endpoints
- Add 9 tests for API endpoints
- Update requirements.txt with fastapi, uvicorn, httpx
- Document API usage in README

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -16,7 +16,8 @@ SPARC automatically collects, parses, and analyzes patents from companies to pro
 - **AI Analysis**: Uses Claude 3.5 Sonnet via OpenRouter to analyze innovation quality and market potential
 - **Portfolio Analysis**: Evaluates multiple patents holistically for comprehensive insights
 - **Batch Processing**: Analyze multiple companies concurrently with progress tracking
-- **Robust Testing**: 31 tests covering all major functionality
+- **REST API**: FastAPI web service with async job support
+- **Robust Testing**: 40 tests covering all major functionality
 
 ## Architecture
 
@@ -25,6 +26,7 @@ SPARC/
 ├── serp_api.py       # Patent retrieval and PDF parsing
 ├── llm.py            # Claude AI integration via OpenRouter
 ├── analyzer.py       # High-level orchestration
+├── api.py            # FastAPI web service
 ├── types.py          # Data models
 └── config.py         # Environment configuration
 ```
@@ -127,6 +129,44 @@ for result in batch_result.results:
 batch_result = analyzer.analyze_companies_sequential(["nvidia", "amd"])
 ```
 
+### REST API
+
+Start the FastAPI server:
+
+```bash
+uvicorn SPARC.api:app --reload
+```
+
+API endpoints:
+
+| Endpoint | Method | Description |
+|----------|--------|-------------|
+| `/health` | GET | Health check |
+| `/analyze/{company}` | GET | Analyze single company |
+| `/analyze/batch` | POST | Analyze multiple companies |
+| `/analyze/batch/async` | POST | Start async batch job |
+| `/jobs/{job_id}` | GET | Get job status |
+| `/jobs` | GET | List all jobs |
+
+Interactive docs available at `http://localhost:8000/docs`
+
+Example API usage:
+
+```bash
+# Single company
+curl http://localhost:8000/analyze/nvidia
+
+# Batch analysis
+curl -X POST http://localhost:8000/analyze/batch \
+  -H "Content-Type: application/json" \
+  -d '{"companies": ["nvidia", "amd", "intel"]}'
+
+# Async batch (for long-running jobs)
+curl -X POST http://localhost:8000/analyze/batch/async \
+  -H "Content-Type: application/json" \
+  -d '{"companies": ["nvidia", "amd", "intel", "qualcomm"]}'
+```
+
 ## Running Tests
 
 ```bash
@@ -159,7 +199,7 @@ pytest tests/ --cov=SPARC --cov-report=term-missing
 - [X] LLM integration for analysis
 - [X] Company performance estimation
 - [X] Multi-company batch processing
-- [ ] FastAPI web service wrapper
+- [X] FastAPI web service wrapper
 - [X] Docker containerization
 - [X] Results persistence (database)
 - [ ] Visualization dashboard